High strength and plastic deformability of Mg-Li-Al alloy with dual BCC phase produced by a combination of heat treatment and multi-directional forging in channel die

被引：47

作者：

Mineta, Takahiro ^{[1
]}

Hasegawa, Kaoru ^{[1
]}

Sato, Hiroyuki ^{[1
]}

机构：

[1] Hirosaki Univ, Grad Sch Sci & Technol, Dept Mech Sci & Engn, Hirosaki, Aomori 0368561, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 773卷 / 773期

关键词：

Magnesium alloys; Spinodal decomposition; Severe plastic deformation (SPD); Mechanical properties; Specific strength; MECHANICAL-PROPERTIES; DEFORMATION BEHAVIOR; SINGLE-CRYSTALS; MAGNESIUM; MICROSTRUCTURE; TEMPERATURE;

D O I：

10.1016/j.msea.2019.138867

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mg-Li-Al (LA143) alloys with high strength and plastic deformability were prepared through a combination of heat treatment and multi-directional forging in a channel die (MDFC). The Vickers hardness of the alloy depended on the quenching temperature. As the applied equivalent strain was increased, the Vickers hardness and yield strength increased. The maximum specific yield strength of the Mg-Li-Al alloy in this study was 263 kNm.kg(-1). The limit of reduction during cold rolling of all MDFCed LA143 samples exceeded 99%. X-ray diffraction, field emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy, revealed that the high specific yield strength could be attributed to severe plastic deformation as well as spinodal decomposition of the body-centered cubic phase. Therefore, LA143 alloys with excellent mechanical properties can be prepared by heat treatment and severe plastic deformation.

引用

页数：8

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